This is reported by Reuters, Censor.NET informs.
While suspicion is likely to fall on Islamic State or its allies, police said they did not know who was responsible and President Joko Widodo urged the public not to speculate on who was behind the attack.
Police said there were at least six explosions and they had shot dead three of the attackers and captured four. Three suicide bombers were suspected to have been involved while three policemen and three civilians were also killed, they said.
The main thrust of the attack was on an office block and it began with a blast outside a Starbucks cafe on its ground floor.
"The Starbucks cafe windows are blown out. I see three dead people on the road. There has been a lull in the shooting but someone is on the roof of the building and police are aiming their guns at him," said a Reuters photographer.
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